Community Water System · PWS CO0130045
Hidden Valley Water District
Operator location Evergreen, Colorado - 62% of 199 violations are health-based (upper-third health share (> 23%)); surface water source; 155 served per SDWIS.
- 155
- People served (this PWS)
- 199
- EPA violations (this PWS)
- 124
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Hidden Valley Water District standing, high SDWIS violation third
62% of 199 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 62% is upper-third health share (> 23%).
The verdict
Hidden Valley Water District sits in the upper third of the sitemap cohort by violation count (199), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (155; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 62% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 199
- Total EPA violations on record
- 62%
- Health-based (MCL / treatment failure)
- 155
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 63
- County
- Jefferson
- School/Daycare
- No
- MCL Violations
- 117
- Monitoring Violations
- 68
- Treatment Tech Violations
- 7
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 72 | 2016 |
| Gross Alpha, Excl. Radon and U | MCL | 22 | 2011 |
| Surface Water Treatment Rule | MR | 14 | 2024 |
| Revised Total Coliform Rule | MON | 14 | 2024 |
| Coliform (TCR) | MR | 13 | 2007 |
| Combined Uranium | MCL | 11 | 2011 |
| Chlorine | MR | 11 | 2024 |
| Coliform (TCR) | MCL | 8 | 1995 |
| Nitrate | MCL | 4 | 2018 |
| Nitrate | MR | 4 | 2020 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 4 | 2023 |
| Arsenic | MR | 3 | 2006 |
| Consumer Confidence Rule | Other | 3 | 2013 |
| Combined Radium (-226 and -228) | MR | 3 | 2015 |
| LEAD AND COPPER RULE REVISIONS | RPT | 3 | 2024 |
| Combined Uranium | MR | 3 | 2015 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 2015 |
Violation Count vs. the National Corpus
Hidden Valley Water District has 199 recorded EPA violations, 85% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 15% carry more. 62% of this system's own violations are health-based (124 of 199), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
199 Higher than most more violations than 85% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Hidden Valley Water District
124 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CO0130045.
Sources: EPA SDWIS · Colorado Department of Public Health and Environment, Water Quality Control
Nationwide peers
199 violations · 155 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Hidden Valley Water District
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Colorado compares on the same EPA violation measures. Colorado systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.